Investigation On Microstructure Behavior And Haz Hardness Of Stainlees Steel AISI304 At Different Filler Wire Diameter And Volatge Using MIG Welding

Mohd Haslay, Ahmad (2010) Investigation On Microstructure Behavior And Haz Hardness Of Stainlees Steel AISI304 At Different Filler Wire Diameter And Volatge Using MIG Welding. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The research work conducted in this dissertation aims to investigate the microstructure behavior and analyze Heat Affected Zone (HAZ) of austenitic stainless steel AISI 304 weldments. Here, the welding is conduct base on three different sizes of filler wire (ER308L). The sizes are 0.8mm, l.Omm, and 1.2mm respectively. The arc voltage use is 20V, 25V and 30V. The current flow for metal inert gas (MIG) welding is set to constant value 1OOA. Meanwhile the plate size for base material is 5mrn. The experiment starts with preparing the specimen by welding process using MIG welding equipment. Then the specimens are dividing into two groups to undergo HAZ hardness and microstructure observation. The behavior of AISI 304 microstructure is studying using Optical Microscope. Hardness of HAZ area is evaluated by Rockwell hardness test. The result is to finding the relation of different filler diameter size wire with the austenitic stainless steel microstructure behavior. A change in microstructural contains and its properties are studying.

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